【摘 要】
：
为了查明遵义烟区土壤有效硅的分布状况,在遵义县和仁怀市共采集87份耕层土壤样品并进行了分析。结果表明,土壤有效硅含量在30.24～444.89 mg/kg之间,平均值为169.75 mg/kg,变
【机 构】
：
贵州省烟草公司遵义市公司,中国农业博物馆,湖北省农科院植保土肥研究所
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为了查明遵义烟区土壤有效硅的分布状况,在遵义县和仁怀市共采集87份耕层土壤样品并进行了分析。结果表明,土壤有效硅含量在30.24～444.89 mg/kg之间,平均值为169.75 mg/kg,变异系数为73.27%。如果以100 mg/kg作为烟区土壤有效硅的临界值,则有20.69%的土壤缺硅。不同类型土壤有效硅含量平均值黄壤最高,石灰土次之,水稻土最低。不同母质发育的土壤有效硅含量从高到低依次为页岩〉石灰岩〉白云岩〉泥灰岩〉白云质灰岩〉第四纪粘土〉黄色砂岩。在酸性至中性土壤中,有效硅含量与pH存在极显
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